LT1765-3.3 LINER [Linear Technology], LT1765-3.3 Datasheet - Page 2

• Manufacturer Part Number: LT1765-3.3
• Description: Monolithic 3A, 1.25MHz Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
LT1765/LT1765-1.8/LT1765-2.5/
LT1765-3.3/LT1765-5
Input Voltage .......................................................... 25V
BOOST Pin Above SW ............................................ 20V
Max BOOST Pin Voltage .......................................... 35V
SHDN Pin ............................................................... 25V
FB Pin Current ....................................................... 1mA
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
PARAMETER
Maximum Switch Current Limit
Oscillator Frequency
Switch On Voltage Drop
V
V
Shutdown Supply Current
Feedback Voltage
2
The
V
IN
IN
IN
Undervoltage Lockout
Supply Current
= 15V, V
BOOST
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
GND
SW
V
IN
T
GROUND PIN CONNECTED TO
JMAX
1
2
3
4
C
8-LEAD PLASTIC SO
LARGE COPPER AREA
= 0.8V, Boost = V
= 125 C,
JC(PIN 4)
S8 PACKAGE
TOP VIEW
W
= 30 C/W
JA
= 90 C/W,
8
7
6
5
SYNC
V
FB
SHDN
C
W W
IN
+ 5V, SHDN, SYNC and switch open unless otherwise noted.
U
CONDITIONS
3.3V < V
I = 3A
(Note 3)
V
3V < V
(Note 3)
SHDN
ORDER PART
LT1765ES8
W
MARKING
NUMBER
S8 PART
IN
= 0V, V
IN
U
1765
< 25V, 0.4V < V
< 25V
IN
= 25V, V
U
(Note 1)
C
SW
< 0.9V
= 0V
SYNC Pin Current .................................................. 1mA
Operating Junction Temperature Range
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
(Note 2) ........................................... – 40 C to 125 C
BOOST
GND
GND
EXPOSED PAD SOLDERED TO LARGE
V
V
SW
SW
NC
LT1765 (Adj)
LT1765-1.8
LT1765-2.5
LT1765-3.3
LT1765-5
IN
IN
JA
16-LEAD PLASTIC TSSOP
= 45 C/W,
1
2
3
4
5
6
7
8
COPPER PLANE
FE PACKAGE
TOP VIEW
JC(PAD)
= 10 C/W
16
15
14
13
12
11
10
9
GND
NC
SYNC
V
FB
SHDN
NC
GND
C
1.182
1.176
1.764
3.234
MIN
2.47
2.45
1.1
4.9
3
FE PART MARKING
1.25
TYP
270
2.6
1.2
1.8
2.5
3.3
15
4
1
5
LT1765EFE
LT1765EFE-1.8
LT1765EFE-2.5
LT1765EFE-3.3
LT1765EFE-5
ORDER PART
1765EFE
1765EFE18
1765EFE25
1765EFE33
1765EFE-5
NUMBER
1.218
1.224
1.836
3.366
MAX
2.73
2.55
430
1.6
1.3
5.1
A
35
55
6
= 25 C.
sn1765 1765fas
UNITS
MHz
mV
mA
A
V
A
A
V
V
V
V
V
V